/*
 * Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com>
 * 
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <stdlib.h>
#include <string.h>

#include <rho/natio.h>

/****************************************************************************
 * path_parent
 *
 * Returns a string that evaluates to the parent of the filesystem object
 * described by <path>.
 */

char *path_parent(const char *path) {
	const char *tail;
	char *parent;
	size_t size;

	tail = strrchr(path, PATH_SEP);

	if (!tail) {
		return strdup("");
	}
	
	size = (uintptr_t) tail - (uintptr_t) path;

	parent = malloc(size + 1);
	if (!parent) return NULL;
	strlcpy(parent, path, size + 1);

	return parent;
}
